Half the calls we get in Moultonborough are about a dog that came out of the lake and straight onto the rug. The other half are about a smell with no stain to go with it — which means it’s down in the pad, and we have to find it before we can price it.
Lake Kanasatka is three hundred and fifty-eight acres sitting at the foot of Red Hill, and Moultonborough holds the entire shoreline plus about ninety-four percent of the watershed. It has had a rough run with cyanobacteria. The state posted bloom advisories in 2020, again in 2021, again in 2022, issued watches through 2024, and saw another bloom in June of 2025. The lake association and the town put something on the order of eight hundred thousand dollars into a treatment in the spring of 2024, and the blooms came back regardless.
Here’s the part that lands on your carpet. The state tells people to rinse themselves and their dogs with fresh water right away after any contact with a bloom, because a dog that licks its own coat can be poisoned by what’s on it. So people rinse — which is the right call, and it also means a genuinely wet dog comes through the door several times a week all summer instead of a merely damp one.
Then there’s Red Hill. The fire tower trail is a standard Moultonborough afternoon, and a dog that’s done it arrives home wet to the belly with the mud still riding along. Between the lake and the hill, the carpet inside your door takes a beating the rest of the house never sees.
Rinse the dog outside, then dry the belly and feet before the door opens. Keeping a towel on the step is a nuisance for thirty seconds and it saves the rug inside the door — which is the single piece of carpet we get called about most in this town.
Wet dog is an odor problem with an easy half and a hard half. The easy half is coat oil and lake water sitting in the fibers; that extracts out and the room smells fine again. The hard half is that the same rug has been soaked and half-dried twice a week since June, so the backing and the floor underneath have never fully dried out. That’s where the sour note is actually coming from, and it needs the rug lifted and the floor under it dried — not another pass over the surface.
Urine is a different animal altogether. It goes through the carpet, through the backing, into the pad, and often enough into the subfloor, and it leaves salts behind that sit there dry and dormant. Then a humid stretch in July rehydrates them and the whole room announces itself again. That’s why people conclude a cleaning “didn’t work” — the surface got cleaned and the reservoir underneath it was never touched.
So we go around the room in the dark with a UV light and a moisture meter and tape off what we find, and it is nearly always more ground than the homeowner expected. Then we quote it. Treatment means flooding the contaminated area with an enzyme that digests the source, giving it time to work, and sub-surface extraction to pull the whole thing back up through the pad. Where the pad is saturated across a wide area, cutting that section out and replacing it is cheaper and it actually works. We say so when that’s the case.
Spot treatments start at $40–$75 per area. Full sub-surface urine decontamination gets quoted by the size of what the UV light actually turns up, which is why we look first and give you the number after, rather than the other way around.
Rinsing is the right thing and you should keep doing it — the state advises it specifically, because a dog that licks a coat with bloom on it can get very sick. It does mean more water coming into the house. Dry the belly and the feet at the door and the rug just inside will last a great deal longer.
That’s the normal pattern and it isn’t your fault. Urine salts dry into crystals down in the pad and stay quiet until humidity brings them back to life. A surface cleaning never got near them. Treating it means getting an enzyme down to where the crystals actually are and then pulling the whole thing back out.
A UV light in a darkened room shows old urine as a dull glow, and a moisture meter tells us how deep and how wide it traveled. We tape it off and show you before we quote anything. Most people are surprised by the result — one visible spot is usually three or four spots underneath.
Yes. If the pad is saturated across a large area, or it has soaked into the subfloor, treating it is throwing money at something that will smell again next summer. Pulling that section of pad, sealing the subfloor, and laying new pad is the fix. It costs less than doing the wrong thing twice.
Not once it’s dry. The enzyme products are biological and they’re safe around animals and children after drying, which takes a few hours with air moving through. We keep everybody off the treated area until then, dog included — mostly because walking on it wet undoes the work we just did.
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